package com.seqb.system.controller;

import com.seqb.common.controller.BaseController;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * @author lilinshen
 * @title 验证码controller
 * @description 请填写相关描述
 * @date 2019/11/12
 */
@Controller
public class KaptchaController extends BaseController {
    @Autowired
    private Producer producer;

    /**
     * 生成验证码
     */
    @RequestMapping("/kaptcha")
    public void kaptcha(HttpServletRequest request, HttpServletResponse response) {
        HttpSession session = request.getSession();
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        String capText = producer.createText();
        session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
        BufferedImage bi = producer.createImage(capText);
        try (ServletOutputStream out = response.getOutputStream()) {
            ImageIO.write(bi, "jpg", out);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
